IB Chemistry HL 3.4.1 Nucleophiles Question Bank

Practise IB Chemistry HL 3.4.1 with questions identifying electron-rich nucleophiles and their donated pairs.

Exam points

identify an available lone pair or electron-rich region that can form a new bond
show the nucleophile donating an electron pair to an electron-deficient atom
classify a nucleophile as a Lewis base while distinguishing its role from an electrophile

[Maximum number: 2]

Some reactions of but-2-ene are given below.

Figure for Question 3.4.1—Nucleophiles question 1 — IB Chemistry HL

Explain why the hydroxide ion is a better nucleophile than water.

$\mathrm{OH}^{-}$ has a negative charge/higher electron density; stronger attraction to the carbon atom with the partial positive charge / OWTTE;

Marking guidance:

Do not accept just stronger attraction.
Reference to carbon atom needed for M2.

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3.4.1—Nucleophiles question 1